packbytes.c File Reference

Packbytes compression as used in Apple Preferred Format. More...

#include <stdio.h>
#include <string.h>
#include "struct.h"
#include "io.h"
#include "gfx2log.h"
#include "packbytes.h"

Include dependency graph for packbytes.c:

Functions
void	PackBytes_pack_init (T_PackBytes_data *data, FILE *f)
	init before packing More...
int	PackBytes_pack_add (T_PackBytes_data *data, byte b)
	Add a byte to the packbits stream. More...
int	PackBytes_pack_flush (T_PackBytes_data *data)
	Flush the packed data to the file. More...
int	PackBytes_pack_buffer (FILE *f, const byte *buffer, size_t size)
	Pack a full buffer to FILE. More...

Detailed Description

Packbytes compression as used in Apple Preferred Format.

Function Documentation

PackBytes_pack_init()

void PackBytes_pack_init	(	T_PackBytes_data *	data,
		FILE *	f
	)

init before packing

Parameters

data	storage for packbits data
f	FILE output or NULL (for no output)

References T_PackBytes_data::f.

Referenced by PackBytes_pack_buffer(), and Save_2GS().

PackBytes_pack_add()

int PackBytes_pack_add	(	T_PackBytes_data *	data,
		byte	b
	)

Add a byte to the packbits stream.

Returns

-1 for error, 0 if OK

References T_PackBytes_data::list, T_PackBytes_data::list_size, PackBytes_pack_flush(), and T_PackBytes_data::repetition_mode.

Referenced by PackBytes_pack_buffer(), and Save_2GS().

PackBytes_pack_flush()

int PackBytes_pack_flush

(

T_PackBytes_data *

data

)

Flush the packed data to the file.

Returns

-1 for error, or the size of the packed stream so far

References T_PackBytes_data::f, GFX2_ERROR, GFX2_Log(), T_PackBytes_data::list, T_PackBytes_data::list_size, NULL, T_PackBytes_data::output_count, T_PackBytes_data::repetition_mode, Write_byte(), and Write_bytes().

Referenced by PackBytes_pack_add(), PackBytes_pack_buffer(), and Save_2GS().

PackBytes_pack_buffer()

int PackBytes_pack_buffer	(	FILE *	f,
		const byte *	buffer,
		size_t	size
	)

Pack a full buffer to FILE.

Parameters

f	FILE output or NULL (for no output)
buffer	input buffer
size	byte size of input buffer

Returns

-1 for error, or the size of the packed stream so far

References PackBytes_pack_add(), PackBytes_pack_flush(), and PackBytes_pack_init().